Thomas shaw



@eine gitane' zttrnt @frn THOMAS SHAW, OF- PHILADELPHIA, PENNSYLVANIA.

Letters Patent No. 77,326, dated April 28, 1868.

IMPROVEMENT IN. WASHERS.

i T0 ALL WHOM IT MAY CONCERN:-

Be it known that I, THOMAS SHAW, of the city and county of Philudelphia,Pennsylvania, have invented a new and improved Spring-Fowl Washer; -andI hereby declare the following to be a full, clear, and exactdescription of the sume, reference` being had to the Vaccompanyingdrawings, and to the letters of reference marked thereon.

My invention consists in the shaping of an ordinary washer so as tospring against the head of bolt or mit,

end to hold .the same in the manner end for the purpose ns hereafterdescribed.

In orderto enableothers to use and practise my invention, I will proceedto describe its construction and operation. l l

On reference to the accompanying drawing, which forms part of thespecification- Figure 1 represents washers, c c, secured by an ordinarybolt, a, to piece wood b.

Figure 2 represents plain view of washer, and

Figure 3 an edge View of the same.

Fig. 2 represents one side of washer, cutat d by a. shear, so as topresent taper edges when sprung apart, as represented in edge view, iig.3.

The washer may be made of herd iron or ste'el, and its operation is tosecure the nut from turning when jolted. A

On reference to the drawing it will be observed that the taper cut onwasher is inthe direction to permit the nut to revolve freely over itwhen the'bolt is being made tight; but it will not revolve so freelyover it when it is turned back, as the edges,'e e, of the wcsher'eatchupon the surface of the nut' and the wood, and oppose its turning'unless sulieient power be applied to remove it.

This washer can b'e used in any place where the ordinary washer isrequired, and will secure the nutfrom turning or becoming loosewhenjarred.

I am aware of the patent of Elliott and Seely, granted February 22,1868, for improvement in lock-nut and washer, but do not claim theirmethod of making and using their devices.

What I claim, undvdesire to secure by Letters Patent, is-

The washer d, constructed as described. l

THOMASSHAW. [L 5.]

Witnesses:

E. COBB, ELIAS J. SHAW.

